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Subject: Re: [Homebrew_PCBs] Shelf life of HCl/H2O2

From: "Zoran A. Scepanovic" <zastos@...>
Date: 2009-01-06

Hello Markus,

Tuesday, January 6, 2009, 10:02:35 AM, you wrote:

> Then, Stefan wrote " If you want to measure this, you can get a
> hydrometer. The ones sold for car battery acid checks will usually do. A
> refractometer should work as well."

> A hydrometer - when useing google - seems to be a device to measure
> humidity? Correct? What is a "refractometer", which of the two would be

Device for measuring humidity is named HyGrometer:
http://en.wikipedia.org/wiki/Hygrometer

> I'm sorry if these are dumb questions, but since working with chemistry

There are no dumb questions, only dumb answers :)

For Hydrometer: http://en.wikipedia.org/wiki/Hydrometer

For Refractometer: http://en.wikipedia.org/wiki/Traditional_handheld_refractometer

--
Best regards,
Zoran A. Scepanovic
zastos@...

∗∗∗∗∗∗∗∗∗
COINCIDENCE happens.
∗∗∗∗∗∗∗∗∗

Please be advised what was said may be absolutely wrong,
and hereby this disclaimer follows.
I reserve the right to be wrong and admit it in front of the entire world.



Local time: 10:40


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